My Journey Through Energy Transfers

       This is a presentation of how energy is transferred in nature.  Birds use the transfer of Gravitational Potential Energy to move and survive.  Birds transfer all of their Potential energy into Kinetic Energy so that they can fly at blazing speeds and catch prey.

        The system in this particular example is the bird and the earth.  The only transfer of energy is from full Potential to Kinetic and some potential.  The bird dives down, reducing air friction in an aerodynamic shape.  This transfers all of the Energy to Kinetic energy.  The formula for the bird's energy would be PEG=KE.  Velocity, in meters per second, and mass, in kilograms, are necessary for solving the Kinetic energy as 1/2xv^2, in Joules.  The height, in meters, the mass, in kilograms, and the gravitational pull of the earth, 9.8 meters per second squared, are necessary for solving the Potential Gravitational Energy as mgh.  That's my story of Energy Transfers and how it relates to the beauty of nature.

Attributions

http://www.hickerphoto.com/data/media/161/flying-birds_T5301.jpg
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http://www.hickerphoto.com/data/media/161/birds-of-prey_T5808.jpg
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Mythbusters Lab 2

Myth #2: An object always changes its motion if there is a force exerted on it.

Statement: If an object always changes its motion if there is a force exerted on it by other objects, and we roll a ball at a bottle, then the ball will stop.

The sum of the forces is -Fn1 but the ball rolls through the bottle without changing direction, disproving the myth.

Conclusion:

       My prediction was wrong since the ball rolled straight through the bottle and didn't change direction at all.  I believed that the ball would somewhat change direction, but nothing of that nature happened.  If the ball had hit a wall, then the ball would have bounced back and changed in the complete opposite direction.  This is a commonly believed myth.  When there is a large force at play, but when there is a small force it doesn't affect it at all.  The myth is one of those "no duh" type things, but it turned out to be false.

Mythbuster Lab 1

During this episode, I will be testing a myth sent to me by my physics teacher.

Myth: An object always moves in the direction of the net force exerted on it.

Prediction: If an object always moves in the direction of the net force exerted on it, and we drop a ball on the ground, then the ball will bounce, and continue in the opposite direction of the force of gravity, disproving the myth.

The sum of the forces is -Fg while the ball is in the air after it hit the ground, but it is still rising and it comes back to Tori.

Conclusion:

The myth is busted because the ball rose and came back to Tori.  Originally, I thought that this would be very difficult to bust, but I believe that this test thoroughly busted the myth.  Most people would believe this myth because an object mostly moves in the direction of the applied force, which is probably the origin of this myth.  Our testing busted the myth, and I hope that this will make people rethink their thought process.